Strontium Oxide Powder from Mexico
Strontium oxide (SrO) is a white to yellowish powder used in glass manufacturing and pyrotechnics for its fluxing properties. Classified under HTS 2816.40.10.00 as an oxide of strontium in Chapter 28, distinct from other metal oxides.
Duty Rate — Mexico → United States
4.2%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Provide assay certificates confirming >99% SrO content to avoid disputes over purity and classification
• Label as hazardous (corrosive/alkaline) per GHS standards and ensure proper UN packaging for transport
• Check for barium contamination; mixtures exceeding thresholds may require reclassification under other strontium/barium subheadings